CVE-2026-1820
Received Received - Intake
Stored XSS in Media Library Alt Text Editor WordPress Plugin

Publication date: 2026-03-07

Last updated on: 2026-03-07

Assigner: Wordfence

Description
The Media Library Alt Text Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'bvmalt_sc_div_update_alt_text' shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-03-07
Last Modified
2026-03-07
Generated
2026-06-16
AI Q&A
2026-03-07
EPSS Evaluated
2026-06-15
NVD
CVE-2026-1820
EUVD
EUVD-2026-10132
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

The Media Library Alt Text Editor plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 1.0.0. This vulnerability exists because the plugin does not properly sanitize and escape user-supplied input in the 'bvmalt_sc_div_update_alt_text' shortcode. As a result, authenticated users with contributor-level access or higher can inject malicious scripts into pages. These scripts will execute whenever any user views the infected page.

Impact Analysis

This vulnerability can allow attackers with contributor-level access or above to inject arbitrary web scripts into pages. These scripts can execute in the context of other users viewing the affected pages, potentially leading to theft of session cookies, defacement, or other malicious actions. The CVSS score of 6.4 indicates a medium severity impact, with potential confidentiality and integrity loss but no impact on availability.

Compliance Impact

I don't know

Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by identifying if the Media Library Alt Text Editor plugin for WordPress is installed and running a version up to and including 1.0.0. Since the vulnerability involves the shortcode 'bvmalt_sc_div_update_alt_text', checking for the presence of this shortcode in WordPress pages or posts may help detect potential exploitation."}, {'type': 'paragraph', 'content': 'Additionally, monitoring HTTP requests and responses for injected scripts in pages that use this shortcode can indicate exploitation attempts.'}, {'type': 'paragraph', 'content': 'Specific commands to detect the vulnerability are not provided in the available resources.'}] [2]

Mitigation Strategies

Immediate mitigation steps include updating the Media Library Alt Text Editor plugin to a version that fixes the vulnerability, if available.

If an update is not available, consider disabling or removing the plugin to prevent exploitation.

Restrict contributor-level and higher user access to trusted users only, as the vulnerability requires authenticated contributor-level access or above.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-1820. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart